We are live on ! Find out more
William Blair & Company

William Blair & Company Portfolio holdings

AUM $38.4B
1-Year Est. Return 25.71%
This Fund
S&P 500
This Quarter Est. Return
+13.98%
1 Year Est. Return
+25.71%
3 Year Est. Return
+88.7%
5 Year Est. Return
+104.53%
10 Year Est. Return
+665.86%
AUM
$27.3B
AUM Growth
+$3.7B
Cap. Flow
+$865M
Cap. Flow %
3.17%
Top 10 Hldgs %
25.38%
Holding
1,900
New
178
Increased
749
Reduced
623
Closed
72

Top Buys

Rank Stock Value
1
SPLK
Splunk Inc
SPLK
+$77.8M
2
GD icon
General Dynamics
GD
+$49.6M
3
ROK icon
Rockwell Automation
ROK
+$43.3M
4
LMBS icon
First Trust Exchange-Traded Fund IV First Trust Low Duration Opportunities ETF
LMBS
+$32.3M
5
JPM icon
JPMorgan Chase
JPM
+$30.6M

Top Sells

Rank Stock Value
1
WORK
Slack Technologies, Inc.
WORK
+$24.2M
2
NTRS icon
Northern Trust
NTRS
+$24.1M
3
BKNG icon
Booking.com
BKNG
+$22.5M
4
EXEL icon
Exelixis
EXEL
+$17.5M
5
DOCU
DocuSign
DOCU
+$15M

Sector Composition

Rank Sector Weight
1 Technology 27.82%
2 Healthcare 18.6%
3 Financials 11.15%
4 Consumer Discretionary 10.38%
5 Industrials 8.96%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
RHI icon
501
Robert Half
RHI
$4.27B
$3.69M 0.01%
58,993
-111
-0.2% -$6.62K
TRU icon
502
TransUnion
TRU
$15.1B
$3.65M 0.01%
36,831
-6,068
-14% -$556K
MEDP icon
503
Medpace
MEDP
$16.4B
$3.64M 0.01%
26,133
-797
-3% -$100K
PFFD icon
504
Global X US Preferred ETF
PFFD
$2.17B
$3.62M 0.01%
140,376
-6,849
-5% -$173K
HYG icon
505
iShares iBoxx $ High Yield Corporate Bond ETF
HYG
$17.9B
$3.62M 0.01%
41,456
+2,204
+6% +$189K
GSBD icon
506
Goldman Sachs BDC
GSBD
$1.11B
$3.62M 0.01%
+189,111
New +$3.25M
PAVE icon
507
Global X US Infrastructure Development ETF
PAVE
$14.3B
$3.6M 0.01%
169,585
+168,901
+24,693% +$3.28M
HUBB icon
508
Hubbell
HUBB
$26.8B
$3.55M 0.01%
22,623
– –
YUM icon
509
Yum! Brands
YUM
$41.6B
$3.54M 0.01%
32,591
+6,959
+27% +$710K
VBR icon
510
Vanguard Morningstar Small-Cap Value ETF
VBR
$38.1B
$3.52M 0.01%
24,753
+1,316
+6% +$170K
PCYO icon
511
Pure Cycle
PCYO
$274M
$3.49M 0.01%
310,755
-10,500
-3% -$104K
VMI icon
512
Valmont Industries
VMI
$9.52B
$3.49M 0.01%
+19,937
New +$3.1M
AEP icon
513
American Electric Power
AEP
$68B
$3.48M 0.01%
41,733
-540
-1% -$46.9K
CRWD icon
514
CrowdStrike
CRWD
$227B
$3.46M 0.01%
65,268
+15,928
+32% +$621K
IBB icon
515
iShares Biotechnology ETF
IBB
$9.83B
$3.42M 0.01%
22,608
-739
-3% -$106K
OPEN icon
516
Opendoor
OPEN
$3.42B
$3.41M 0.01%
+155,206
New +$3.25M
WSC icon
517
WillScot Mobile Mini Holdings
WSC
$4.04B
$3.41M 0.01%
147,340
+126,643
+612% +$2.55M
WCN
518
Waste Connections
WCN
$41.6B
$3.4M 0.01%
33,174
+1,329
+4% +$137K
ZBH icon
519
Zimmer Biomet
ZBH
$18.8B
$3.4M 0.01%
22,737
-1,946
-8% -$275K
HACK icon
520
Amplify Cybersecurity ETF
HACK
$3.01B
$3.4M 0.01%
59,000
+3,472
+6% +$175K
COP icon
521
ConocoPhillips
COP
$150B
$3.4M 0.01%
84,902
+3,502
+4% +$129K
GRUB
522
DELISTED
Just Eat Takeaway.com N.V. American Depositary Shares
GRUB
$3.39M 0.01%
22,848
-1,435
-6% -$212K
RSI icon
523
Rush Street Interactive
RSI
$2.86B
$3.38M 0.01%
156,085
+141,235
+951% +$2.11M
CWB icon
524
State Street SPDR Bloomberg Convertible Securities ETF
CWB
$5.75B
$3.37M 0.01%
40,734
+12,262
+43% +$925K
AZEK
525
DELISTED
The AZEK Co
AZEK
$3.37M 0.01%
87,684
+63,485
+262% +$2.29M
19 20
21
22 23

Similar funds

Parallax Volatility Advisers
Parallax Volatility Advisers San Francisco, California $38.6B AUM 45.89% 1-Year Est. Return
Credit Agricole
Credit Agricole Montrouge Cedex, France $38.1B AUM
Carson Wealth (CWM LLC)
Carson Wealth (CWM LLC) Omaha, Nebraska $38.1B AUM 19.66% 1-Year Est. Return
Nomura Holdings
Nomura Holdings Tokyo, Japan $37.7B AUM 34.44% 1-Year Est. Return
Fayez Sarofim & Co
Fayez Sarofim & Co Houston, Texas $39.1B AUM 15.14% 1-Year Est. Return
HF
HRT Financial New York $40.1B AUM 58.22% 1-Year Est. Return
First Manhattan
First Manhattan New York $36.1B AUM 11.5% 1-Year Est. Return
Newport Trust Company
Newport Trust Company Washington, District of Columbia $40.7B AUM 24.62% 1-Year Est. Return

William Blair & Company's Q4 2020 Portfolio in Review

As of Q4 2020, William Blair & Company held 1,900 positions worth $27.3B, up 16% from $23.6B the previous quarter. Its ten largest holdings account for 25% of the portfolio.

William Blair & Company deployed $865M of net new capital in Q4 2020, opening 178 new positions and adding to 749 existing holdings. Its largest new stake was Seagen Inc. Common Stock: 91,539 shares worth $16M.

By sector, the portfolio is most concentrated in Technology at 28% of assets, up from 27% a quarter earlier, followed by Healthcare and Financials.

On the sell side, the largest reduction was Slack Technologies, Inc., an estimated $24.2M trimmed.

  • William Blair & Company's largest Q4 2020 buy was Seagen Inc. Common Stock: 91,539 shares worth $16M.
  • William Blair & Company added most to Splunk Inc in Q4 2020, an estimated $77.8M increase.
  • William Blair & Company's biggest Q4 2020 reduction was Slack Technologies, Inc., cutting an estimated $24.2M.
  • William Blair & Company fully exited Dunkin' Brands Group, Inc. in Q4 2020, selling an estimated $12.1M.
  • William Blair & Company's ten largest holdings make up 25% of its $27.3B portfolio in Q4 2020.
  • William Blair & Company opened 178 new positions and closed 72 in Q4 2020.
  • William Blair & Company's portfolio value rose 16% quarter-over-quarter to $27.3B.

Based on William Blair & Company's 13F filing for Q4 2020, filed 9 Feb 2021.